Configuration Example, Firewalling

McAfee Firewall – NAT mapping

René Jorissen on December 28, 2011 0 Comments • Tags: #arp #enterprise #firewall #mcafee #nat #proxy #redirect

While testing a McAfee Enterprise Firewall running software 8.2.0, I had some problems with the creation of a NAT mapping. The firewall is configured as standalone firewall. All (NAT / access rule) configuration on the firewall is done using Access Control Rules. McAfee uses two types of NAT mapping: NAT: mostly used to translate a … Read More

Other stuff...

GNS3 supports JunOS

René Jorissen on December 6, 2009 0 Comments • Tags: #cisco #emulate #firewall #gns3 #juniper #junos #router

A lot of you will know GNS3. GNS3 is a graphical network simulator that allows simulation of complex networks. With GNS3 you can simulate multiple Cisco routers and the Cisco PIX firewall. GNS3 allows you to emulate real Cisco IOS images, design and experiment with complex networks, connect the virtual lab to the real world … Read More

Mail relaying

Barracuda – Mail Protocol Violation

René Jorissen on September 8, 2009 1 Comment • Tags: #barracuda #firewall #mail #protocol #spam #violation

A customer updated the firmware from a Barracuda SPAM &Virus 300 firewall. The firmware was upgraded from version 3.4 to version 3.5.12.024. After the upgrade no email was coming in or going out through the Barracuda firewall. All email was blocked and the following reason was visible in the message log: Mail Protocol Violation At … Read More

Mail relaying

Secret Barracuda Spam firewall options

René Jorissen on May 4, 2009 1 Comment • Tags: #ampexpert #ampexpert1 #1 #advanced #barracuda #extra #firewall #option #secret #spam

While troubleshooting a Barracuda Spam Firewall 300 I found a forum on internet, which shows you how to get an extra tab under the Advanced configuration of the Barracuda Spam Firewall. The “secret” configuration page is enabled with the following steps: Logon to the Barracude Spam Firewall 300; Click on the Advanced tab; Add &expert=1 … Read More

Firewalling

Failed to establish VPN through PIX

René Jorissen on October 17, 2008 5 Comments • Tags: #1723 #305006 #47 #asa #creation #failed #firewall #for #gre #pix #pptp #protocol #regular #stateful #translation #vpn

We migrated our Internet connection lately and reconfigured our PIX firewall. We added some memory to install the latest firmware version (8.0(4)). After putting the PIX firewall in production some of the employees were complaining they couldn’t establish any PPTP VPN Tunnels anymore to customers. Every time when some one called me, I tried it … Read More

Configuration Example, Firewalling

Cisco IOS Authentication Proxy

René Jorissen on June 6, 2008 0 Comments • Tags: #authenticate #firewall #ios #proxy

Today I have been playing a little with my router at home. I was looking at different websites and stumbled on a Cisco website about Cisco IOS Firewall Authentication Proxy. So I thought by myself, lets give it a try. Cisco IOS Authentication Proxy is a feature with the following discription: “The Cisco IOS Firewall … Read More